78972717178510 has 32 divisors (see below), whose sum is σ = 143172366469632. Its totient is φ = 31362326455200.

The previous prime is 78972717178477. The next prime is 78972717178561. The reversal of 78972717178510 is 1587171727987.

It is a self number, because there is not a number n which added to its sum of digits gives 78972717178510.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11935042 + ... + 17331781.

It is an arithmetic number, because the mean of its divisors is an integer number (4474136452176).

Almost surely, 2^{78972717178510} is an apocalyptic number.

78972717178510 is a deficient number, since it is larger than the sum of its proper divisors (64199649291122).

78972717178510 is a wasteful number, since it uses less digits than its factorization.

78972717178510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29268768.

The product of its (nonzero) digits is 96808320, while the sum is 70.

The spelling of 78972717178510 in words is "seventy-eight trillion, nine hundred seventy-two billion, seven hundred seventeen million, one hundred seventy-eight thousand, five hundred ten".